<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像 -->
      <div class="avatar_box">
        <img src="../assets/logo.png">
      </div>
      <!-- 登录表单 -->
      <el-form ref="loginFormRef" :model="loginForm" :label-position="labelPosition" class="login_form" :rules="loginFormRules">
        <!-- 用户名 -->
        <el-form-item prop="name">
          <el-input v-model="loginForm.name" prefix-icon="iconfont icon-account" clearable></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" type="password" prefix-icon="iconfont icon-password" clearable></el-input>
        </el-form-item>
        <!-- 登录按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginFormRef">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 对齐方式：右对齐
      labelPosition: 'right',
      // 登录表单数据
      loginForm: { name: '', password: '' },
      loginFormRules: {
        name: [
          { required: true, message: '请输入姓名', trigger: 'blur' },
          { max: 10, message: '姓名最长 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { max: 32, message: '密码最长 32 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  created: function () {
    // 回车监听
    var _this = this
    document.onkeydown = function (e) {
      let key = window.event.keyCode
      if (key === 13) {
        _this.login()
      }
    }
  },
  methods: {
    resetLoginFormRef () {
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        if (valid) {
          const { data } = await this.$axios.post('login', this.loginForm)
          // 请求成功, 登录成功 / 失败判断
          // FIXME 后台断言, 返回数据异常，请修复
          if (data.code === 1) {
            if (data.data.loginResult) {
              // 登录成功提示
              this.$message.success(data.data.message)
              // 数据缓存
              window.sessionStorage.setItem('realName', data.data.user.realName)
              window.sessionStorage.setItem('rongyunAppKey', data.data.user.rongyunAppKey)
              window.sessionStorage.setItem('rongyunToken', data.data.user.rongyunToken)
              // 页面跳转
              await this.$router.push('/home')
            } else {
              // 登录失败
              this.$message.error(data.data.message)
            }
          }
        }
      })
    }
  }
}
</script>

<style lang="less" scoped>
  .login_container {
    background-color: #2b4b6b;
    height: 100%;
  }

  .login_box {
    width: 450px;
    height: 300px;
    background-color: #ffffff;
    border-radius: 3px;
    left: 50%;
    top: 50%;
    position: absolute;
    transform: translate(-50%, -50%);
  }

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eeeeee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #dddddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #ffffff;

    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eeeeee;
    }
  }

  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }

  .btns {
    display: flex;
    justify-content: flex-end;
  }

</style>
